Glaucoma Valve Position Sensor for IOP Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current glaucoma treatments, such as drainage devices, face challenges in maintaining consistent and accurate fluid flow, leading to inefficiencies and potential degradation over time, which can result in inadequate IOP control.
Innovation Solution
An IOP control device with a housing, membrane, and position sensor system that detects the membrane's position to regulate fluid flow through the drainage tube, using pressure differentials to control flow rates and maintain optimal valve states, thereby minimizing power consumption and preventing over-pressurization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drainage devices are used to treat glaucoma, then fluid flow from the anterior chamber is improved, but consistency and accuracy of fluid flow deteriorate over time due to device degradation
Solution Approach 1:
The patent implements a feedback mechanism using a position sensor to detect the membrane position and provide real-time information about valve state. This feedback loop allows the system to monitor and maintain consistent fluid flow by detecting when the membrane position changes due to degradation or pressure variations, enabling corrective actions to maintain flow consistency over time.
Solution Approach 2:
The patent replaces simple mechanical drainage with a controlled system incorporating a position sensor and feedback mechanism. This substitution transforms a passive mechanical drainage device into an actively monitored system that can detect and respond to changes in membrane position, thereby maintaining flow consistency despite mechanical degradation.
2Measurement precision
If position sensor system is added to detect membrane position, then valve state monitoring is improved, but device complexity increases
Solution Approach 1:
The patent uses the membrane itself as an intermediary element that serves dual purposes: it performs the flow control function and simultaneously acts as the sensing element for position detection. The conductive portion is integrated into the membrane structure, allowing the membrane's mechanical displacement to directly generate an electrical signal that indicates valve state, thereby simplifying the overall system architecture.
Solution Approach 2:
The patent merges the flow control function and the sensing function into a single integrated structure. The membrane with its conductive portion combines the mechanical flow regulation role with the electrical sensing role, eliminating the need for separate sensing components and reducing overall device complexity while maintaining measurement precision.
3Productivity
If membrane deflection is used to control flow rates, then flow regulation is improved, but power consumption increases due to continuous monitoring requirements
Solution Approach 1:
The patent employs periodic or event-driven monitoring rather than continuous monitoring. The position sensor detects membrane position changes and provides feedback only when significant displacement occurs, allowing the system to regulate flow effectively while minimizing power consumption by activating monitoring only when needed rather than continuously.
Solution Approach 2:
The system uses the natural physical displacement of the membrane under pressure differentials to generate the sensing signal. The membrane's own movement in response to pressure changes directly triggers the position detection, eliminating the need for external power-intensive actuation or continuous active monitoring, thereby achieving flow regulation with minimal power consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively regulates intraocular pressure and bleb pressures, optimizing the performance of IOP control systems by ensuring precise control of fluid flow and extending the longevity of the device through efficient power usage and preventing membrane damage.
Implementation Method 1
The membrane is configured to affect flow through the fluid flow passageway from the entrance port to the exit port by deflecting in response to pressure differentials of the flow control chamber pressure and the fluid flow channel pressure acting on the opposing sides of the membrane
Implementation Method 2
The position sensor system includes a first conductive portion and a second conductive portion positioned to selectively contact the first conductive portion to indicate the position of the membrane relative to the fluid flow passageway
Data Source
AI summary
An IOP control device for implantation in an eye of a patient is disclosed, including a housing with an entrance port and an exit port, a membrane anchored within the housing in a manner forming a flow control chamber on a first side of the membrane and a fluid flow passageway on a second opposing side of the membrane, and a position sensor system. The flow control chamber is arranged to contain a gas creating a flow control chamber pressure, and the membrane is configured to affect flow through the fluid flow passageway from the entrance port to the exit port by deflecting in response to changes in the flow control chamber pressure. The position sensor system includes a first conductive portion and a second conductive portion positioned to selectively contact the first conductive portion to indicate the position of the membrane relative to the fluid flow passageway.